Need better stepper motor controller

You should have a good fan blowing on your controller. Machines that do not include a board fan are just a poor design. All the newer drivers need a fan even if they do have heatsinks and most manuals or instructions for installing them will even tell you this. My Bigfoot BSD2660's needed a fan blowing across them as do the Trinamic TNC2208 driver I have coming soon for my Anycubic 4Max.

As far as your printing speed maybe the motor is nit your problem but the inability to heat the filament enough. Maybe your power supply is not able to keep up with heating demand. Maybe you need a higher wattage heater. Filament acts like a heat sink and it sucks enormous amounts of heat from the hotend and the faster you feed the more it sucks away. you also have to raise your temp higher than normal for higher than normal speeds which is typically 40mm/s.

50mm/s is considered fast and anything above that is pushing most machines unless they are designed for fast printing which is usually a machine that is going to set you back $2000 out of the box. Theses machines like the Enders that claim 60mm/s + may do it but there will be tons of artifacts in the print and there we be issues with maintaining heat on long prints. Most of the time when you see these statements it was done by laying one stripe down at the max speed the machine could do and then using fuzzy averaging.. It was not done on a full print.

Power supply has plenty of power.
Nozzle is at 240 for PLA.
The only solution i see is to use 42mm motor. It will work and it will not get hot and it will not need any reduction gears such as titan.
Issue is the same on 2 different printers. One cheap chinese FlyingBear Ghost and another is old Robo3d.
Titan motors just dont work for direct drive system unless you either print very slow or filament spool provides no resistance at all.

I thought to my self OMG i can make a smaller carriage with smaller motor YAY !!!! but then i had to add thick ass extruder with reducing gears in it and that make no difference in dimensions at the end.
The only benefit was, weight loss. Since then, i've had nothing but trouble and failed prints. And on top of that few burned down controllers because swapping motors requires swapping wires also and i dont always remember which of the many motors need it when i swap them angry at how much money i paid and how much they failed to deliver what advertised.

For my printer, E3D motor for titan extruder did not work. No matter what voltage i set, motor either too weak to pull or gets too hot and fails to pull. Either way it failed and i cant even get my money back.

Trusted E3D store product VS chinese on ebay, but it turned out to be same thing, just X2 the price and no return policy.

this may be a silly question but did you change the step /mm when installing the titan and  did you recalibrate the extruder.

IMHO something is not right  I have  a titan on one machine and an aero with titan on another and have had no similar issues.

The titan has a 3:1 gear reduction so the motor should have plenty of torque.

Correct. Silly question.

I was hoping to gain torque from 1/3 reduction and i did but it still wasn't enough.

What i learned from 4 different stepper controllers and from at least 8 of them burned down due to swapping motors that have different polarity and no identification markings (had to use multimeter to figure it out) is that not all controllers are equal.

2 unbranded in particular were interesting.
1 would have  very little effect on torque while adjusting the potentiometer. It would only make the motor hot without gaining much torque  and THE MOST IMPORTANT FACTOR with this particular controller is that the controller its self DOES NOT GET HOT at all, not even warm.
This controller came from Robo3D printer. I have no clue how to identify it and i dont really need to, it does not help the situation anyway.

Another would have very noticale effect on torque with the slightest turn of potentiometer. Hair of a turn one way and motor stall weak, hair of turn another way and motor pulls but controller and motor overheat.
Bad potentiometer you may say ? Sounds like it but i have a number of those controllers and some of them are  new yet they all act the same.